save the start call time and the call duration instead of start date and end date

src/net/java/sip/communicator/impl/gui/main/call/CallListCellRenderer.java

@@ -109,10 +109,7 @@ public Component getListCellRendererComponent(JList list, Object value,
            
             this.durationLabel.setText(
                     Messages.getString("duration") + " " +
-                    GuiUtils.formatTime(
-                    GuiUtils.substractDates(
-                            participant.getEndTime(),
-                            participant.getStartTime())));
+                    GuiUtils.formatTime(participant.getCallTime()));
             
             //this.nameLabel.setIcon(listModel
             //        .getMetaContactStatusIcon(contactItem));

src/net/java/sip/communicator/impl/gui/main/call/CallPanel.java

@@ -163,7 +163,7 @@ public void callParticipantRemoved(CallParticipantEvent evt)
                             participantPanel.getParticipantName(),
                             participantPanel.getCallType(),
                             participantPanel.getStartTime(),
-                            participantPanel.getEndTime());
+                            participantPanel.getTime());
                 
                 callManager.getMainFrame().getCallListManager().addCallRecord(
                         0, participantRecord);

src/net/java/sip/communicator/impl/gui/main/call/CallParticipantPanel.java

@@ -38,7 +38,7 @@ public class CallParticipantPanel extends JPanel
     
     private Date startDate;
     
-    private Date endDate;
+    private Date callTime = new Date(0);
     
     private Timer timer;
     
@@ -121,7 +121,7 @@ public void actionPerformed(ActionEvent e)
                     new Date(System.currentTimeMillis()),
                     startDate);
             
-            endDate = time;
+            callTime = time;
             timeLabel.setText(GuiUtils.formatTime(time));
         }
     }
@@ -141,12 +141,9 @@ public Date getStartTime()
      * 
      * @return the start time of the contained participant call
      */
-    public Date getEndTime()
-    {
-        if(endDate == null)
-            endDate = startDate;
-        
-        return endDate;
+    public Date getTime()
+    {   
+        return callTime;
     }
     
     /**

src/net/java/sip/communicator/impl/gui/main/call/GuiCallParticipantRecord.java

@@ -8,6 +8,7 @@
 
 import java.util.*;
 
+import net.java.sip.communicator.impl.gui.utils.*;
 import net.java.sip.communicator.service.callhistory.*;
 
 /**
@@ -29,12 +30,12 @@ public class GuiCallParticipantRecord
     
     private Date startTime;
     
-    private Date endTime;    
+    private Date callTime;    
     
     public GuiCallParticipantRecord(String participantName,
             String direction,
             Date startTime,
-            Date endTime)
+            Date callTime)
     {
         this.direction = direction;
         
@@ -42,7 +43,7 @@ public GuiCallParticipantRecord(String participantName,
         
         this.startTime = startTime;
         
-        this.endTime = endTime;
+        this.callTime = callTime;
     }
     
     public GuiCallParticipantRecord(CallParticipantRecord participantRecord,
@@ -54,7 +55,8 @@ public GuiCallParticipantRecord(CallParticipantRecord participantRecord,
         
         this.startTime = participantRecord.getStartTime();
         
-        this.endTime = participantRecord.getEndTime();
+        this.callTime = GuiUtils.substractDates(
+                participantRecord.getEndTime(), startTime);
     }
     
     public String getDirection()
@@ -62,9 +64,9 @@ public String getDirection()
         return direction;
     }
     
-    public Date getEndTime()
+    public Date getCallTime()
     {
-        return endTime;
+        return callTime;
     }
 
     public String getParticipantName()